Trends – Innovation – ITSM – IT Architecture – Requirement Analysis – Business views – Service Governance – Storage – Virtualization etc… What do I do, why do I do it, and why does everyone else do what they do? Time to reflect and this is my little pot where I share my view and others great contributions to this IT-world!

My last post provided guidance on the optimal XenApp virtual machine specification. Now in the last post of the series, I’m going to walk through an example sizing exercise.

Scenario

Company ABC recently completed a user segmentation exercise. The following table includes 8 user groups that have been identified as good candidates for a Hosted Shared Desktop. None of these user groups requires the ability to install applications or the ability to customize their desktop beyond profile based changes. Three separate Provisioning Services images will be created due to application compatibility conflicts identified by Citrix AppDNA.

With Hosted Shared Desktops, it is important to consider the ‘Maximum Number of Concurrent Users’ column rather than the ‘Total Number of Users’ column. Sizing the environment for concurrency rather than the total number of users will help to reduce infrastructure costs without affecting performance or availability.

Sufficient redundancy should be incorporated into the sizing estimate so that a single XenApp server or virtualization host failure does not affect the total number of concurrent users that can be supported (n+1).